Good day ,ZEN MOD ：
Can all NPN/PNP triodes be replaced BC550/560?
THX U very much!
Can all NPN/PNP triodes be replaced BC550/560?
THX U very much!
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of course!
🙂
generally ....regarding availability ... feel free to make your own pcbs , if you are enjoying in that ; if there is any problem , I will help , naturally (I mean with everything else except pcb troubleshooting - I'm pretty much unable to do that , due to fact that I'm Holmes in that area almost every day in my work , so I'm sorta fed-up
)I will make offer - similar to SissySIT and Babelfish M25 - meaning - at least two kit levels
#1 should be bare pcb with presoldered SMDs , including 4pcs/channel input 2SK2145BL buggers
#2 should be pcb with presoldered SMDs , including 4pcs/channel input 2SK2145BL buggers, plus all parts for populating pcbs , including IRFP150 outputs
0 series pcb done its duty - changed few details , fixed one mistake , so development finished from that point
today , funny day , tests with Semisouth down , and after that - listening tests ....... in both interesting iterations - SJEP down , and IRFP down
edit: I'm positive that I'm going to bring at least 5 sets of #1 for BAF raffle
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Thx u ZEN MOD!
Can u post the boom,? I want to make my own PCB.
If it is impossible ,Don't mind!
THX!
Can u post the boom,? I want to make my own PCB.
If it is impossible ,Don't mind!
THX!
I will tonight ..... though , not lazy Greedy Boy BOM type with all links and free pass to all porn sites** , but only Eagle generated parts list
**hate that ..... when everything is on the plate , how one can learn anything?
**hate that ..... when everything is on the plate , how one can learn anything?
Babelfih J2 , SJEP120R100 down
Ha , surprise!!!!
(or not )
with already presented iteration with both output positions occupied with mighty IRFP150 , we are having nice Pleasure Machine , with nice and cozy low THD ...... but! - when SJEP120R100 is introduced in lower output position, we got Pinpoint Machine
Ha , surprise!!!!
(or not )
with already presented iteration with both output positions occupied with mighty IRFP150 , we are having nice Pleasure Machine , with nice and cozy low THD ...... but! - when SJEP120R100 is introduced in lower output position, we got Pinpoint Machine
Attachments
same , 4R load
just to state - I have no intention to play with MOX values in output vertical , to invoke 2nd harmonic above 3rd ; I have what I intended with poor man's iteration and that's it
just to state - I have no intention to play with MOX values in output vertical , to invoke 2nd harmonic above 3rd ; I have what I intended with poor man's iteration and that's it
Attachments
btw. day is still young , so I'll put SJEP in upper position , too ......... and report
I'll be back
, so I'll put SJEP in upper position , too ......... and report I'll be back
Pinpoint in the meaning of precise/accurate?
If so, I am in, so my non matched SJEP120R100 will find a wonderfull home
If so, I am in, so my non matched SJEP120R100 will find a wonderfull home
pinpoint , how else ?
sorry , couldn't squeeze week or so - between yesterday and today , to be able giving first hand (ear) experience
sorry , couldn't squeeze week or so - between yesterday and today , to be able giving first hand (ear) experience
exactly
though , let's wait to listening test .......... even if I can be sure at least 90% in prediction
So it looks like you are deliberately mismatching output transistor types in a P-P output stage. And the results for 1Watt out indicate that the H2 has fallen to the same level as H3 from the previous configuration.
Interesting
Edit: Or is this actually a single-ended output stage with the IRFP150 as the current source?
Interesting
Edit: Or is this actually a single-ended output stage with the IRFP150 as the current source?
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well , it's pretty much all clear from schematics and graphs 🙂
also , from few intention notes in post #1 , it's clear what I wanted to achieve
regarding question what it is - name of the game is J2 Babelfishing , and J2's OS is stage loaded in drain with sorta active CCS , in form of Mu Follower ....
also , from few intention notes in post #1 , it's clear what I wanted to achieve
regarding question what it is - name of the game is J2 Babelfishing , and J2's OS is stage loaded in drain with sorta active CCS , in form of Mu Follower ....
Right, I was confused by the optocoupler in the OS, then took another look. Yes, Mu-Follower -ish.
well , boyz , I finished measurements , reverted to all IRFP , and put some muzak through .....
I am biased ...... but I'm really hooked with first notes of Larry Coryell's Retrospective ........
I am biased ...... but I'm really hooked with first notes of Larry Coryell's Retrospective ........